TOMEI Forged Piston Set 86mm for Mitsubishi 4G63 [TA202A-MT01D]

The TOMEI Forged Piston Set 86.00 mm (OEM +1.0) for the Mitsubishi 4G63 uses a high-strength forging process to handle elevated combustion pressure, with thinner wall sections for weight reduction and minimized machining to preserve strength. It features an oval barrel skirt shaped with thermal expansion in mind, a valve recess that supports 1 mm oversized valves, and thinner piston rings to reduce friction loss.

TOMEI Forged Piston Set 86.00mm for Mitsubishi 4G63

The TOMEI forged piston set 86mm for 4G63 is a set of high-strength forged pistons for the Mitsubishi 4G63. Forged construction gives the strength and fatigue resistance needed for high-boost, high-power 4G63 builds where cast pistons reach their limit. This set has a 86.00mm bore with a 34.70mm compression height.

Features

• Forged construction for strength in high-boost, high-power builds
• 86.00mm bore, 34.70mm compression height
• Engineered specifically for the Mitsubishi 4G63
• Precision machined to tight tolerances
• Designed and manufactured in Japan

Specifications

Applications

Mitsubishi 4G63 engine builds, such as the Lancer Evolution and other 4G63-powered platforms. Confirm bore sizing against your block before ordering.

Notes

• These are internal engine components intended for a full engine build. Professional machining, measurement, and installation are strongly recommended.
• Sold as a piston set. Confirm the correct bore size for your build before ordering, as machining work is not reversible.

Frequently Asked Questions

• What engine does the TOMEI forged piston set 86mm for 4G63 fit? It is designed for the Mitsubishi 4G63. Confirm your bore sizing before ordering.
• What is the bore size? This set is 86.00mm with a 34.70mm compression height.
• Why forged pistons? Forged pistons are stronger and more fatigue resistant than cast pistons, which makes them well suited to high-boost, high-power 4G63 builds.
• Do I need a machine shop? Yes. We recommend professional measurement, machining, and installation as part of a complete engine build.

About TOMEI

TOMEI Powered is a Japanese performance manufacturer with roots dating to 1968 and a long motorsport history building engines and internal components for Japan’s most iconic platforms. TOMEI forged pistons are engineered for strength and precision in high-output engine builds.